CONTROLLED DIRECTIONAL WELL AND HORIZONTAL WELL DRILLING DEVICE Russian patent published in 2006 - IPC E21B7/04 E21B47/12 E21B47/22 

FIELD: well drilling, particularly to control well direction.

SUBSTANCE: device comprises drilling bit, downhole motor with whipstock, whipstock position measuring module, hydraulic orientator and measuring and telemetric module arranged in non-magnetic sub and connected with ground-based reception and processing complex. Whipstock position measuring module comprises body with central flushing orifice on which electrode is arranged. The electrode is located between insulators and is electrically isolated from the body. Electric circuits, measuring sensors, power source and transmission means are installed in the body. Reception and processing means are included in measuring and telemetric module so that the reception and processing means is separated from whipstock position measuring module by electric spacer and is adapted to receive electric signals from whipstock position measuring module transmitter. Accelerometers may be included in measuring sensors of whipstock position measuring module. Whipstock, whipstock position measuring module and hydraulic orientator may be connected one to another by quick-releasable connector, for instance by thread.

EFFECT: increased well quality, possibility to use flexible drilling pipes, namely coiled tubing, for well drilling.

3 cl, 2 dwg